High-speed rail bridge deck cable trough protection layer slope control tool

Abstract

The utility model discloses a high -speed rail bridge floor cable channel protection layer gradient control frock, including longitudinal support still including pulley assembly, height control lever and level fixed on the other end of height control lever of one end welding fixed on longitudinal support on longitudinal support, weld fixedly, the level fixed on the other end of height control lever is used as the core support to longitudinal support, and the height control lever of welding fixed on one end is matched and is fixed, and the longitudinal slope reference that meets the design standard is constructed, and then the gradient precision is assisted and is detected with the level fixed on the other end of height control lever, can effectively solve the problem of traditional construction longitudinal slope not in place, the water in cable channel, improves the consistency and accuracy of longitudinal slope control simultaneously, guarantees cable channel protection layer construction quality, reduces manpower and time consumption, significantly improves construction efficiency, and the overall structure is simple, and the installation is convenient, further reduces construction cost, satisfies the high demand of high -speed rail construction to engineering quality and construction progress.

Description

Technical Field

[0001] This utility model relates to the technical field of high-speed railway bridge construction equipment, specifically a tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck. Background Technology

[0002] During the construction of the cable trough protective layer for high-speed railway bridges, in accordance with the construction specifications, a pair of drainage holes must be installed every 4 meters along the length of the cable trough. Furthermore, the cable trough protective layer between any two adjacent pairs of drainage holes must have a longitudinal slope of not less than 3‰ to ensure that water accumulated in the cable trough can be discharged in a timely manner through the drainage holes, thus avoiding long-term water retention that could adversely affect the safe operation of the cable or the durability of the bridge structure.

[0003] In existing technologies, the longitudinal slope of cable trough protective layers is mostly controlled by manual marking. However, this method not only consumes a lot of manpower and time and has low construction efficiency, but is also easily affected by the subjectivity of manual operation. Due to insufficient slope control accuracy, the actual slope of the completed protective layer cannot meet the design requirement of not less than 3‰, which leads to water accumulation in the cable trough. At the same time, the traditional manual marking method also has the disadvantage of poor slope consistency in different construction sections, which is difficult to adapt to the stringent standards of high-speed rail construction for project quality stability and construction progress efficiency. This has become a key problem restricting the improvement of the construction quality of cable trough protective layers. Utility Model Content

[0004] The purpose of this utility model is to provide a slope control tool for the cable trough protective layer of high-speed railway bridge deck, so as to solve the problem mentioned in the background art that the longitudinal slope of the cable trough protective layer relies on manual line marking construction. This method is labor-intensive, time-consuming, inefficient, and the strong subjectivity of human intervention can easily lead to insufficient slope accuracy, which cannot meet the design requirements and cause water accumulation in the cable trough. At the same time, the slope consistency of the construction section is poor, which is difficult to adapt to the stringent standards of quality stability and progress efficiency of high-speed railway projects.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a slope control fixture for the cable trough protection layer of a high-speed railway bridge deck, including a longitudinal support, a pulley assembly installed on the longitudinal support, a height control rod welded and fixed at one end to the longitudinal support, and a level ruler welded and fixed at the other end of the height control rod. The level ruler is used to assist in detecting whether the slope of the longitudinal support meets the requirements, and the pulley assembly is used to move the fixture.

[0006] Based on the preferred embodiment of this technical solution, the longitudinal support is set along the length of the cable trough of the high-speed railway bridge.

[0007] Based on the preferred embodiment of this technical solution, the longitudinal support is made of angle steel or rectangular square tube.

[0008] Based on the preferred embodiment of this technical solution, five sets of height control rods are provided. The five sets of height control rods are spaced apart along the length of the longitudinal support, and the heights of adjacent sets of height control rods are different, so that the longitudinal support forms the required longitudinal slope.

[0009] Based on the preferred embodiment of this technical solution, the five sets of height control levers vary according to a slope of 5‰.

[0010] Based on the preferred embodiment of this technical solution, the pulley assembly includes a base welded and fixed to the bottom of the longitudinal support, a rotating rod rotatably connected to the base, and a pulley body fixedly connected to the rotating rod. The pulley body is used to move the tooling to the next protective layer construction after the construction is completed.

[0011] Based on the preferred embodiment of this technical solution, three sets of bases, rotating rods, and pulley bodies are provided, and the three sets of bases, rotating rods, and pulley bodies are symmetrically distributed at the bottom of the longitudinal support.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. By constructing a longitudinal slope benchmark that meets design standards using a longitudinal support as the core support and a height control rod welded to one end, and then using a level welded to the other end of the height control rod to assist in checking the slope accuracy, this method effectively solves the problems of inadequate longitudinal slope and water accumulation in cable trenches in traditional construction. It also improves the consistency and accuracy of longitudinal slope control, ensuring the construction quality of the cable trench protective layer; reduces manpower and time consumption, significantly improves construction efficiency, has a simple overall structure, is easy to install and use, further reduces construction costs, and meets the high requirements of high-speed rail construction for project quality and construction progress.

[0014] 2. The pulley assembly, consisting of a base, a rotating rod, and a pulley body, ensures connection strength through welding and fixing of the base. The flexible rotation of the rotating rod, combined with the rolling of the pulley body, allows the tooling to be easily moved after a section of construction is completed, reducing the physical exertion of manual handling, shortening construction intervals, and improving construction continuity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the slope control tool for the cable trough protective layer of a high-speed railway bridge deck according to the present invention;

[0016] Figure 2 This is a schematic diagram of the longitudinal support structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the pulley assembly structure of this utility model.

[0018] In the diagram: 1. Longitudinal support; 21. Height control lever; 22. Level; 31. Base; 32. Rotating rod; 33. Pulley body. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Implementable methods already discovered in this field:

[0021] In modern integrated transportation systems, high-speed railway bridges serve as crucial hubs connecting different regions. Their structural safety and functional stability directly determine the operational efficiency, passenger travel experience, and long-term service life of high-speed railway lines. Especially when crossing complex geographical environments such as rivers, valleys, and urban complexes, high-speed railway bridges must not only bear the vertical loads and lateral impacts from train travel but also withstand the long-term effects of natural environmental factors such as wind, rain, temperature differences, and corrosion. Therefore, extremely high requirements are placed on the construction quality of the main bridge structure and various ancillary facilities. Cable troughs, as one of the core ancillary structures of high-speed railway bridges, primarily function to accommodate and protect critical cables such as communication cables, signal cables, and power cables required for the operation of high-speed railway lines. These cables are the "nerve center" ensuring train dispatching, safety monitoring, and stable power supply. Failures due to external environmental factors will directly lead to the shutdown of the high-speed railway line, causing significant economic losses and social impact. As the outer protective structure of the cable trough, the cable trough protective layer not only needs to have sufficient compressive strength and crack resistance to resist mechanical collisions during construction and environmental erosion during operation, but also plays a crucial role in guiding rainwater and preventing water accumulation. If the drainage function of the protective layer fails, rainwater will remain inside the cable trough for a long time, which will not only accelerate the aging and damage of the cable insulation layer, causing safety hazards such as short circuits and leakage, but also seep into the gaps in the bridge structure, leading to steel corrosion and concrete carbonization, which will seriously weaken the durability of the main bridge structure and shorten its service life. Therefore, the construction quality control of the cable trough protective layer, especially the longitudinal slope control which is directly related to the drainage function, has become one of the core control points in the construction process of high-speed railway bridges.

[0022] According to the "Construction Quality Acceptance Standard for High-Speed ​​Railway Bridges and Culverts" (TB10752-2022) and related special construction specifications, the design principle of "segmented drainage and timely dredging" must be strictly followed during the construction of the cable trough protective layer for high-speed railway bridges. A pair of drainage holes should be set every 4 meters along the length of the cable trough. The spacing is determined based on a comprehensive calculation of multiple factors such as the width of the high-speed railway bridge deck, the cross-sectional dimensions of the cable trough, and the local rainfall intensity. If the spacing of the drainage holes is too large, the water collection length in the cable trough will increase, which may cause the water depth to exceed the safety protection threshold of the cable. If the spacing is too small, it will increase the construction procedures and material costs. At the same time, too many drainage holes may also weaken the overall structure of the cable trough. More importantly, the standard clearly requires that the cable trough protective layer between any two adjacent pairs of drainage holes must have a longitudinal slope of not less than 3‰. The setting of this slope value has a rigorous engineering logic: on the one hand, a longitudinal slope of 3‰ can form sufficient drainage force while ensuring a smooth transition of the protective layer structure and avoiding local stress concentration, so that rainwater can quickly gather and be discharged from the drainage holes under the action of gravity; on the other hand, this slope value has been verified by long-term engineering practice and can adapt to the changes in rainfall intensity in different regions. Even in short-term heavy rainfall, it can effectively prevent rainwater from stagnating in the cable trough. From a technical perspective, the longitudinal slope of the cable trough protective layer is not simply an "inclined surface," but rather a continuous drainage channel formed through precise height difference control. The accuracy of this slope directly determines the drainage efficiency. If the actual slope is less than 3‰, the rainwater flow slows down, easily forming a water accumulation layer at the bottom of the cable trough. Especially in low-temperature winter environments, the accumulated water freezes and expands, squeezing the cable trough and protective layer, causing structural cracks. If the slope is too large, it will lead to uneven thickness of the protective layer, and local weak areas are prone to damage during later operation. It may also affect the flatness of the cable laying inside the cable trough. Therefore, strictly following the specifications and achieving precise control of the longitudinal slope of the cable trough protective layer is a key technical link to ensure the functional stability of the high-speed railway bridge's ancillary structures and extend the overall service life.

[0023] In current high-speed railway bridge construction practices, the traditional longitudinal slope control of cable trough protective layers mainly relies on manual line marking construction technology. This technology originates from the construction experience of ordinary highway bridges, municipal roads, and other projects. Its core process is as follows: First, surveyors use a level to mark the elevation control points corresponding to the slope on the bridge retaining walls or reference surfaces on both sides of the cable trough. Then, adjacent control points are connected by nylon or cotton thread to form a visual baseline for the longitudinal slope. Finally, construction workers use this baseline as a reference to complete the construction of the protective layer by manually spreading and leveling concrete. However, applying this traditional technology to the construction of cable trough protective layers for high-speed railway bridges has revealed many insurmountable defects. Firstly, construction accuracy is difficult to guarantee. During manual line marking, factors such as the tension of the nylon thread, the straightness of the thread, and visual alignment errors of the marker points can all cause the baseline to deviate from the design slope. This is especially true in long construction sections (such as single-span bridges exceeding 30 meters in length), where the sag of the thread itself further amplifies the error, resulting in an actual protective layer slope often lower than the 3‰ specification requirement. In some areas, even reverse slopes occur, directly leading to water accumulation problems. Secondly, construction efficiency is low. Manual line marking requires at least 2-3 surveyors and multiple construction workers working together. Marking and verifying the slope for every 4 meters (the distance between a pair of drainage holes) takes more than 30 minutes. Furthermore, during concrete pouring, the baseline... The lines are easily disturbed by construction workers and contaminated by concrete, requiring repeated re-marking, which seriously affects the construction progress and makes it difficult to meet the "rapid construction and early opening" requirements of high-speed rail projects. Furthermore, the construction consistency is poor. Different construction teams have different operating habits and technical levels. Even in the same project, the slope of the protective layer in different sections will have significant deviations. Although the slope of some sections is close to 3‰, the fluctuations are large, forming a "wavy" surface, which also makes it impossible to achieve efficient drainage. In addition, the traditional manual marking technique is extremely unsuitable for the construction environment. Under weather conditions such as strong winds, rain, and strong light, the stability of the baseline and the accuracy of the visual judgment of the surveyors will be further reduced, and construction must be suspended, resulting in delays. Since high-speed rail bridge construction often requires continuous operation in the open field, the impact of these environmental factors is even more prominent. From an engineering cost perspective, traditional techniques suffer from extremely high rework rates due to insufficient precision. According to construction data from a high-speed rail project, approximately 25% of the cable trench protective layers constructed using manual line marking require removal and reconstruction due to substandard slope. This not only increases the consumption of materials such as concrete and steel but also incurs additional labor and machinery costs. Furthermore, the rework process may cause secondary damage to the already constructed bridge structure, creating new quality hazards.

[0024] Please see Figure 1-3This utility model provides an embodiment of a slope control fixture for the cable trough protective layer on a high-speed railway bridge. The fixture includes a longitudinal support 1, a pulley assembly mounted on the longitudinal support 1, a height control rod 21 welded and fixed at one end to the longitudinal support 1, and a level 22 welded and fixed at the other end of the height control rod 21. The level 22 is used to assist in detecting whether the slope of the longitudinal support 1 meets the requirements. The pulley assembly is used to move the fixture. By integrating the synergistic effects of the longitudinal support 1, the pulley assembly, the height control rod 21, and the level 22, the fixture can not only establish a slope benchmark with the help of the height control rod 21, but also verify the slope accuracy in real time with the level 22, and utilize the pulley assembly to achieve flexible movement of the fixture. This solution comprehensively addresses the problems of low accuracy and poor efficiency in traditional manual line marking construction, providing an integrated solution for longitudinal slope control of the cable trough protective layer.

[0025] Please see Figure 1 A further solution based on this embodiment is: the longitudinal support 1 is set along the length of the cable trough of the high-speed railway bridge. By setting the longitudinal support 1 along the length of the cable trough, it can be fully adapted to the construction area, ensuring that the slope control range covers the entire cable trough protective layer construction section, avoiding local slope loss of control due to misalignment of the support and the construction direction, and improving the comprehensiveness and pertinence of slope control.

[0026] Please see Figure 1 A further solution based on this embodiment is as follows: the longitudinal support 1 is made of angle steel or rectangular square tube. By using angle steel or rectangular square tube to make the longitudinal support 1, the high strength and high rigidity of these materials are utilized to ensure that the support is not easily deformed by external forces during construction, and can stably support components such as the height control rod 21 and pulley assembly, maintain the stability of the slope reference, and extend the reuse cycle of the tooling.

[0027] Please see Figure 1 A further solution based on this embodiment is as follows: five sets of height control rods 21 are provided. The five sets of height control rods 21 are spaced apart along the length of the longitudinal support 1, and the heights of adjacent sets of height control rods 21 are different, so that the longitudinal support 1 forms the required longitudinal slope. By setting five sets of height control rods 21 that are spaced apart along the longitudinal direction and have different heights, the longitudinal support 1 can be supported by multiple support points, and the longitudinal slope that meets the design requirements can be accurately constructed, avoiding slope deviation caused by single-point support. At the same time, the multiple sets of spaced rods can evenly distribute the construction pressure and ensure the consistency of the slope shape.

[0028] Please see Figure 1A further solution based on this embodiment is as follows: the five sets of height control rods 21 change according to the slope of 5‰. By making the five sets of height control rods 21 change height according to the slope of 5‰, the slope of the longitudinal support 1 can strictly match the construction standard, ensuring that the gradient change of each slope is accurate and controllable. This avoids the problem of insufficient slope caused by manual estimation from a structural point of view, and ensures the reliability of the drainage function of the cable trough.

[0029] Please see Figure 1-3 A further solution based on this embodiment is as follows: The pulley assembly includes a base 31 welded and fixed to the bottom of the longitudinal support 1, a rotating rod 32 rotatably connected to the base 31, and a pulley body 33 fixedly connected to the rotating rod 32. The pulley body 33 is used to move the tooling to the next protective layer construction after the construction is completed. Through the pulley assembly composed of the base 31, the rotating rod 32 and the pulley body 33, the welding and fixing of the base 31 ensures the connection strength. The flexible rotation of the rotating rod 32 and the rolling of the pulley body 33 enable the tooling to be easily moved after a section of construction is completed, reducing the physical consumption of manual handling, shortening the construction interval time and improving the continuity of construction.

[0030] Please see Figure 1 A further solution based on this embodiment is as follows: three sets of base 31, rotating rod 32 and pulley body 33 are provided. The three sets of base 31, rotating rod 32 and pulley body 33 are symmetrically distributed at the bottom of the longitudinal support 1. Through the three sets of symmetrically distributed base 31, rotating rod 32 and pulley body 33, the bottom of the tooling is subjected to balanced force when it moves, avoiding tilting or jamming caused by excessive force at a single point. At the same time, the symmetrical distribution can adapt to construction grounds with different flatness, ensuring the stability of the movement process, and further improving the operational safety and practicality of the tooling.

[0031] Working principle: First, the longitudinal support 1 is placed along the length of the cable trough of the high-speed railway bridge, serving as the basic support for the entire fixture. Then, five sets of height control rods 21 (one end welded and fixed to the longitudinal support 1) are distributed longitudinally at intervals and designed with a 5‰ slope. The height difference between each set allows the longitudinal support 1 to accurately form the required longitudinal slope, providing a benchmark for the construction of the cable trough protective layer. At this time, a level 22 welded and fixed to the other end of the height control rod 21 can assist in real-time detection of whether the slope of the longitudinal support 1 meets the requirements, ensuring slope accuracy. During construction, the longitudinal support 1 stably bears the construction pressure and maintains the slope benchmark unchanged due to its high strength characteristics. After the construction of a section of the protective layer is completed, the fixture can be easily moved to the next construction area by using three sets of symmetrically distributed pulley assemblies at the bottom of the longitudinal support 1 (composed of a welded and fixed base 31, a rotating rod 32 rotatably connected, and a pulley body 33), enabling continuous operation. Through the coordinated cooperation of all components, the longitudinal slope of the cable trough protective layer is precisely controlled efficiently.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck, comprising a longitudinal support (1), characterized in that: It also includes a pulley assembly installed on the longitudinal support (1), a height control rod (21) welded and fixed at one end to the longitudinal support (1), and a level (22) welded and fixed at the other end of the height control rod (21). The level (22) is used to assist in detecting whether the slope of the longitudinal support (1) meets the requirements, and the pulley assembly is used to move the tooling.

2. The tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck according to claim 1, characterized in that: Longitudinal supports (1) are installed along the length of the cable trough of the high-speed railway bridge.

3. The tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck according to claim 1, characterized in that: The longitudinal support (1) is made of angle steel or rectangular square tube.

4. The tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck according to claim 1, characterized in that: Five sets of height control rods (21) are provided. The five sets of height control rods (21) are spaced apart along the length of the longitudinal support (1), and the heights of adjacent sets of height control rods (21) are different, so that the longitudinal support (1) forms the required longitudinal slope.

5. The tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck according to claim 1, characterized in that: Five sets of height control levers (21) are adjusted according to a slope of 5‰.

6. The tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck according to claim 1, characterized in that: The pulley assembly includes a base (31) welded and fixed to the bottom of the longitudinal support (1), a rotating rod (32) rotatably connected to the base (31), and a pulley body (33) fixedly connected to the rotating rod (32). The pulley body (33) is used to move the tooling to the next section of the protective layer construction after the construction is completed.

7. The tooling for controlling the slope of the cable trough protective layer on a high-speed railway bridge deck according to claim 6, characterized in that: The base (31), rotating rod (32) and pulley body (33) are each provided in three sets. The three sets of base (31), rotating rod (32) and pulley body (33) are symmetrically distributed at the bottom of the longitudinal support (1).

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